Kohlrabi
Cabbages · Brassica oleracea var. gongylodes · Cabbage family · Biennial
Fast brassica (50–60 days); good for succession sowing.
How it grows
| Sun | Part shade |
|---|---|
| Moisture | Normal |
| Soil | heavy (clay loam) |
| Spacing | 25 cm |
| Rotation group | Brassicas & leafy greens |
| How to plant | seedlings |
| Green manure before it | Common vetch |
| Protector plant | Hyssop |
When to sow, by climate zone
| Zone | In the ground | Sow indoors | Sow again for autumn |
|---|---|---|---|
| Zone 3 | early May – mid-May | early Apr | |
| Zone 4 | late Apr – early May | late Mar | |
| Zone 5 | mid-Apr – mid-May | mid-Mar | |
| Zone 6 | early Apr – late May | early Mar | mid-Aug – late Aug |
| Zone 7 | mid-Mar – mid-May | mid-Feb | late Aug – early Sep |
| Zone 8 | early Mar – late Apr | late Jan | early Sep – mid-Sep |
| Zone 9 | early Feb – early Apr | early Jan | late Sep – early Oct |
| Zone 10 | mid-Jan – mid-Mar | mid-Dec | mid-Oct – late Oct |
Dates for the average frost dates of each zone; the app works them out for your own town.